SYSTEM FOR COMMUNICATION, COMMUNICATION METHOD BETWEEN TWO OR MORE COMPUTERS LOCATED ON AT LEAST TWO PRIVATE NETWORKS, METHOD FOR CONDUCTING COMMUNICATION BETWEEN SYSTEMS EXISTING ON INDIVIDUAL PRIVATE NETWORKS, METHOD FOR ESTABLISHING COMMUNICATION LINK BETWEEN THE SAME SYSTEMS, INTEGRATED CIRCUIT CHIP FOR ESTABLISHING DATA EXCHANGE BETWEEN THE SYSTEMS, AND COMPUTER-READABLE MEDIUM HAVING PROGRAM COMMAND FOR ESTABLISHING DATA EXCHANGE BETWEEN THE SYSTEMS

摘要

PROBLEM TO BE SOLVED: To provide a method for performing communication between two computers located at the back of a NAT router and a fire wall.;SOLUTION: The method for performing the communication and data exchange between more than two systems, each existing on individual private networks and located at the back of each fire wall, includes establishment of a TCP connection to a proxy server. A packet for TCP monitoring is transmitted, and mapping of the port and address of each fire wall device is to be made clear for each system within the network, and the mapping is provided to the systems; and the proxy server is designed to transmit a SYN packet to the other system, and then to command each system to transmit a SYN+ACK packet. The proxy server is designed, to essentially promote the establishment of a direct communication between the systems, and to make TCP data packet to be exchanged, without relation to the proxy server succeedingly.;COPYRIGHT: (C)2006,JPO&NCIPI